11581770225 has 24 divisors (see below), whose sum is σ = 19157023872. Its totient is φ = 6174203200.

The previous prime is 11581770191. The next prime is 11581770227. The reversal of 11581770225 is 52207718511.

It is not a de Polignac number, because 11581770225 - 2¹⁵ = 11581737457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11581770227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141880 + ... + 208070.

It is an arithmetic number, because the mean of its divisors is an integer number (798209328).

Almost surely, 2^11581770225 is an apocalyptic number.

11581770225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11581770225 is a deficient number, since it is larger than the sum of its proper divisors (7575253647).

11581770225 is a wasteful number, since it uses less digits than its factorization.

11581770225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68537 (or 68532 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 39.

The spelling of 11581770225 in words is "eleven billion, five hundred eighty-one million, seven hundred seventy thousand, two hundred twenty-five".